jamesbisset
@jamesbisset
Noble Member
Luthier
Rep Points: 1489
Joined: May 23, 2020
Last seen: Mar 3, 2025
Topics: 31 / Replies: 272
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RE: My first laminated semi-hollowbody

With some anxiety, I tackled the front lamination. I was so concerned about the way the back had split that I cut apart the book-matched front face ...

2 years ago
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RE: My first laminated semi-hollowbody

Never mind. Let’s get on with the easy stuff. The neck!

2 years ago
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RE: My first laminated semi-hollowbody

By now, I had made two new moulds for back and front with 4 layers of 3mm MDF: i.e. an arch of around 12mm rather than 15mm as previously. And with g...

2 years ago
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RE: My first laminated semi-hollowbody

@tv101 I’m making this up as I go along. It just seemed like a simple way to persuade the joined veneers not to split along my dodgy glue line. As ...

2 years ago
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RE: My first laminated semi-hollowbody

Turns out some of you have short attention spans and don’t like all this talk of veneers. So, just for you, here’s some video of a vacuum pump.

2 years ago
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RE: My first laminated semi-hollowbody

Hmmm... let’s see... Nope. Well, that’s a little disappointing!

2 years ago
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RE: My first laminated semi-hollowbody

@rocknroller912 The adventure with the cutaway side suggests that the next stage in trying to force sawn veneer into a compound curve, without splitti...

2 years ago
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RE: My first laminated semi-hollowbody

@tv101 We used a two-pack urea resin. I doubt we’d have had time to correct my foolish error otherwise. And yes, left it overnight in the bag.

2 years ago
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RE: My first laminated semi-hollowbody

Next day, the other side was a doddle by comparison.

2 years ago
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RE: My first laminated semi-hollowbody

I decided to try and simplify things by bending and gluing the sides, which only require bending the lamination in one plane - not two. We chose the...

2 years ago
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RE: My first laminated semi-hollowbody

Before I continue with this enthralling build, I’ll just clarify that veneer softener is normally used to flatten veneer that is warping and curling. ...

2 years ago
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RE: My first laminated semi-hollowbody

OFFS! Turns out there’s something called Veneer Softener! Who knew! Everybody but me, apparently.

2 years ago
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RE: My first laminated semi-hollowbody

I’m still accumulating little bits of advice from across the internet. Here’s one from Airpress: “When a knife cut veneer (0.6mm) gets wet with glue...

2 years ago
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RE: My first laminated semi-hollowbody

Yup! A volume knob! I can’t resist it — is full sook 11?

2 years ago
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RE: My first laminated semi-hollowbody

@tv101 I reckon the critical factor will be how airtight the bag is. If it doesn’t lose much air in 5 mins then (slowly increasing) pressure is mai...

2 years ago
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RE: My first laminated semi-hollowbody

We’re trying to design assembly techniques that emulate methods Gibson pioneered in the 40s, but without building a factory full of heavy engineering....

2 years ago
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RE: My first laminated semi-hollowbody

@robin I used Titebond for speed because we were only running tests, but I reckon the combination of Titebond AND spray AND thin (and a little warped)...

2 years ago
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RE: My first laminated semi-hollowbody

Conclusion? I can’t afford the time or the wood to do a full set of controlled experiments. There are too many variables: Mould depth The curve...

2 years ago
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RE: My first laminated semi-hollowbody

And so I returned with a new mould made with 6 layers of 2mm MDF rather than 5 layers of 3mm MDF - so approx 12mm deep rather than 15mm. We were run...

2 years ago
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RE: My first laminated semi-hollowbody

Both pressings were aborted. I now had two slightly bent veneers with cracks. To continue the testing, we took the two cracked veneers and put a leaf ...

2 years ago
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